package org.nobody.mallb2c.mallware.service.impl;

import org.nobody.common.constant.WareConstant;
import org.nobody.mallb2c.mallware.entity.PurchaseDetailEntity;
import org.nobody.mallb2c.mallware.service.PurchaseDetailService;
import org.nobody.mallb2c.mallware.service.WareSkuService;
import org.nobody.mallb2c.mallware.vo.MergeVo;
import org.nobody.mallb2c.mallware.vo.PurchaseDoneVo;
import org.nobody.mallb2c.mallware.vo.PurchaseItemDoneVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.nobody.common.utils.PageUtils;
import org.nobody.common.utils.Query;

import org.nobody.mallb2c.mallware.dao.PurchaseDao;
import org.nobody.mallb2c.mallware.entity.PurchaseEntity;
import org.nobody.mallb2c.mallware.service.PurchaseService;
import org.springframework.transaction.annotation.Transactional;

import javax.validation.constraints.NotNull;


@Service("purchaseService")
public class PurchaseServiceImpl extends ServiceImpl<PurchaseDao, PurchaseEntity> implements PurchaseService {

  @Autowired
  PurchaseDetailService detailService;

  @Autowired
  WareSkuService wareSkuService;

  @Override
  public PageUtils queryPage(Map<String, Object> params) {
    IPage<PurchaseEntity> page = this.page(
      new Query<PurchaseEntity>().getPage(params),
      new QueryWrapper<PurchaseEntity>()
    );

    return new PageUtils(page);
  }

  @Override
  public PageUtils queryPageUnreceived(Map<String, Object> params) {
    IPage<PurchaseEntity> page = this.page(
      new Query<PurchaseEntity>().getPage(params),
      //状态[0新建，1已分配，2正在采购，3已完成，4采购失败]
      new QueryWrapper<PurchaseEntity>()
        .eq("status",0)
        .or().eq("status",1)
    );

    return new PageUtils(page);
  }

  @Transactional
  @Override
  public void mergePurchase(MergeVo mergeVo) {
    Long purchaseId = mergeVo.getPurchaseId();

    //todo 确认采购单状态是0(新建),1(已分配)才可以合并

    if (purchaseId == null) { //如果合并采购单时没有选择任何已经创建的采购单 我们这里需要新建一个
      PurchaseEntity purchaseEntity = new PurchaseEntity();

      purchaseEntity.setStatus(WareConstant.PurchaseStatusEnum.CREATED.getCode());
      purchaseEntity.setCreateTime(new Date());
      purchaseEntity.setUpdateTime(new Date());
      this.save(purchaseEntity);
      purchaseId = purchaseEntity.getId();
    }

    List<Long> items = mergeVo.getItems();
    Long finalPurchaseId = purchaseId;
    List<PurchaseDetailEntity> collect = items.stream().map(i -> {
      PurchaseDetailEntity detailEntity = new PurchaseDetailEntity();
      detailEntity.setId(i);
      detailEntity.setPurchaseId(finalPurchaseId);
      detailEntity.setStatus(WareConstant.PurchaseDetailStatusEnum.ASSIGNED.getCode());

      return detailEntity;
    }).collect(Collectors.toList());

    detailService.updateBatchById(collect);

    PurchaseEntity purchaseEntity = new PurchaseEntity();
    purchaseEntity.setId(purchaseId);
    purchaseEntity.setUpdateTime(new Date());
    this.updateById(purchaseEntity);
  }

  /**
   *
   * @param ids 采购单id
   */
  @Override
  public void received(List<Long> ids) {
    //1、 确认当前采购单是新建或则已分配状态
    List<PurchaseEntity> collect = ids.stream().map(id -> {
      PurchaseEntity byId = this.getById(id);
      return byId;
    })
      .filter(item -> item.getStatus() == WareConstant.PurchaseStatusEnum.CREATED.getCode() || item.getStatus() == WareConstant.PurchaseStatusEnum.ASSIGNED.getCode())
      .map(item -> {
        item.setStatus(WareConstant.PurchaseStatusEnum.RECEIVED.getCode());
        item.setUpdateTime(new Date());
        return item;
      })
      .collect(Collectors.toList());

    //2、 改变采购单的状态
    this.updateBatchById(collect);

    //3、 改变采购项(采购需求)的状态
    collect.forEach(item->{
      List<PurchaseDetailEntity> entities = detailService.listDetailByPurchaseId(item.getId());
      List<PurchaseDetailEntity> detailEntities = entities.stream().map(entity -> {
        PurchaseDetailEntity entity1 = new PurchaseDetailEntity();
        entity1.setId(entity.getId());
        entity1.setStatus(WareConstant.PurchaseDetailStatusEnum.BUYING.getCode());
        return entity1;
      }).collect(Collectors.toList());
      detailService.updateBatchById(detailEntities);
    });
  }

  @Transactional
  @Override
  public void done(PurchaseDoneVo doneVo) {
    Long id = doneVo.getId();

    //1、 改变采购项的状态
    Boolean flag = true;
    List<PurchaseItemDoneVo> items = doneVo.getItems();

    List<PurchaseDetailEntity> updates = new ArrayList<>();
    for (PurchaseItemDoneVo item : items) {
      PurchaseDetailEntity detailEntity = new PurchaseDetailEntity();
      if (item.getStatus() == WareConstant.PurchaseDetailStatusEnum.HASERROR.getCode()) {
        flag = false;
        detailEntity.setStatus(item.getStatus());
      }else {
        detailEntity.setStatus(WareConstant.PurchaseDetailStatusEnum.FINISH.getCode());

        //3、 将成功采购的进行入库
        PurchaseDetailEntity entity = detailService.getById(item.getItemId());
        wareSkuService.addStock(entity.getSkuId(), entity.getWareId(), entity.getSkuNum());
      }
      detailEntity.setId(item.getItemId());

      updates.add(detailEntity);
    }

    detailService.updateBatchById(updates);

    //2、 改变采购单状态
    PurchaseEntity purchaseEntity = new PurchaseEntity();
    purchaseEntity.setId(id);
    purchaseEntity.setStatus(flag?WareConstant.PurchaseStatusEnum.FINISHED.getCode():WareConstant.PurchaseStatusEnum.HASERROR.getCode());
    purchaseEntity.setUpdateTime(new Date());
    this.updateById(purchaseEntity);
  }

}
